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The word 'law' means order, hence natural law is simply the natural order. In the sense in which natural law is relevant to jurists, it is the natural order of persons -- specifically, the order of natural persons: human beings that are capable of rational, purposive action, speech and thought. In short, natural law is the natural order of the human world.
Laws are patterns of order. Hence, natural laws are patterns of natural order -- and, in the juristically relevant sense, patterns of order among natural persons.